An object moves 20 m towards the east and then 10m towards the west in 5 seconds. What is it's average velocity and average speed?
Correct answer: A. Speed=6 m/s, velocity=2 m/s
- A. Speed=6 m/s, velocity=2 m/s
- B. Speed=6 m/s, velocity=6 m/s
- C. Speed=2 m/s, velocity=2 m/s
- D. Speed=2 m/s, velocity=6 m/s
Explanation
Average Speed = Total Distance / Total TimeAverage Speed = 20 + 10 / 5 Average Speed = 30 / 5 = 6m/sNow Average Velocity = Total Displacement / Total Time Average Velocity = 20 - 10 / 5 Average Velocity = 10 / 5 = 2 m/sThis is numerical so it can only have one answer so option A is correct.
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